This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A282631 #11 Jul 15 2024 06:04:16 %S A282631 9,25,49,121,289,961,529,1194649,1849,5329,841,16129,7921,2209 %N A282631 The smallest square referenced in A237043 (Numbers n such that 2^n - 1 is not squarefree, but 2^d - 1 is squarefree for every proper divisor d of n.). %e A282631 A237043(1)=6, 2^6-1=63, 63=3*3*7, 63 is not squarefree and the square is 3*3=9. %Y A282631 Cf. A237043, A282632. %K A282631 nonn,more %O A282631 1,1 %A A282631 _Robert Price_, Feb 19 2017